Rotary pump



(No Model.)

G. LENHARD.

ROTARY PUMP. Y No. 298,886. Patented May'ZO, 1884.

Arnivr trice.

GEORGE LENIIARD, OF DETROIT, MICHIGAN.

ROTARY Pom P.

SPECIFICATION forming part of Letters Patent No. 298,866, dated May 20,1884.

Application filed June 27, 1883. (No model.)

.To all whom it may con/cern:

Be it known that I, GEORGE LENHARD, of Detroit, in the county of Wayneand State of Michigan, have invented new and useful Improvements inRotary Pumps andIdo hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanyingdrawings, which form a part of this specification.

This invention relates to an improvement in rotary lift and force pumps;and the improvement consists in the construction and arrangement of thevarious parts, all as hereinafter described and shown.

Figurel is a sectional elevation of my pump. Fig. 2 is a cross-sectionon the line w In the accompanying drawings, which form a part of thisspecication, Ais a hollow conical spindle rigidly supported near itsends in the uprights or standards BB, which form the sides of asupporting-frame for the pump.

C is a diaphragm dividing the aperture through the spindle into twoparts or passages, D and E.

F and G are two lateral openings or ports in the shaft A, on oppositesides of the diaphragm, and upon opposite sides of the spindle.

H is a hub sleeved upon the spindle, which is for a part of its lengthturned slightly conical, as shown, and collars H are employed forholding the hub against lateral displacement.

I are cylinders radiating from the hub H, and formed integral therewith.These cylF inders, of which there may be three or more, are placedsymmetrically around the hub, and each is provided with a piston, J, astuffingbox, K, two ports, L and M, which register with the ports F andG of the spindle, respectively.

N is a circular track rigidly secured to the plane of the axis of thecylinders by transverse stay-bolts a, or in any other suitable way. Thistrack N is placed eccentrically to the spindle A, its center beingvertically below the axis of said spindle O is a circular channel orgroove in the track N.

b are friction-rollers engaging with the circular channel.

c are the piston-rods, provided with the offsets c', and to which thefriction-rollers are secured.

d are sockets upon the ends of the pistons, into which the pistonfrods care detachably secured.

P is a gear-wheel secured concentrically to one side of the hub H.

Q is a pinion meshing with the gear-wheel P, and R is a drive-pulley forapplying power and transmitting the same through the pinion Q and gearedwheel P to the hub H.

S are guides for preventing the pistons from turning upon their axis.They are connected to the pistons J, and pass through an eye in theprojection s, cast integral with the cylinder I.

In practice, if power is applied to the drivepulley R, the hub willrapidly revolve, and the eccentric-track will` operate the pistons,exhausting air or fluid from the passage D through the ports FL andforcing it out again through the ports M G into the passage E, andtherefore, if the passagesD and E are proprely vconnected with suctionand discharge pipes, the device will operate as a lifting and forcepump, and without the necessity of air-cham bers, as the stream obtainedis perfectly continuous, without the least pulsation. To prevent anyvibrations arising from the eccenner face, f, of the track N. Thisarrangement will lessen the friction, as the operation of exhausting`the cylinders will then be performed,

if necessary, by the centrifugal force acquiredv by the pistons, and inthis latter shape the device also gives its best results if used as amotor. When used as a motor, the water will belet into D or E, as thecase may be, under pressure, and acting on the piston will force itoutward; but as it is limited in its movement by the track N, it willride the incline of said track, and in its movement will cause the hub Hto rotate and bring another piston in active operation, and as thepistons are so arranged that there will be no deadcenter, the device canbe at all times used either as a pump or a motor, as desired.

What I claim as my invention is- 1. The combination of the revolvingcylinder I, piston J, grooved track N, and rod c, provided With anoffset, c', and a frictionroller traveling in the grooved track,wherebyAthe pressure is exerted in a straight line, substantially as described.

2. 'In a'combined rotary pump and motor provided with reciprocatingpistons J, and track N, having a grooved channel, O, the combination ofthe piston-rods detachably connected to said pistons J, and having a pinextending at right angles thereto, and carrying 2o an anti-frictionroller, b, constructed t0 enter said channel O, all combined, arranged,and operating as specified.

3. In a rotary pump, the combinatiomwith the cylinder I, piston J, andsuitable means for reciprocating said piston, of the guide S, Working inan eye in the projection s, whereby the piston J is guided in itsmovement, substantially as described.

4. In a combined rotary pump and motor provided With reciprocatingpistons, as J, the rigid track N, having a channel, O, and thepiston-rods c, each having an offset, c', and carrying a friction-rolleradapted to travel in said channel, and constructed to be detachablyconnected with said pistons, substantially as and for the purposespecified.

GEO. LENHARD. Witnesses: y H. S. SPRAGUE, E. SoULLY.

